#include <iostream>
using namespace std;

int main() {
    int i;
    i = 21;
    cout << i << " : " << &i << endl;
    if(true){
        int i;
        cout << i << " : " << &i << endl;
        i = 42;
        cout << i << " : " << &i << endl;
    }
    cout << i << " : " << &i << endl;
    return 0;
}
